Question

-6 • -13 =
18 • -3 =
12 • -14 =
-120• 5 =
-40 • -10 =
-20 • -30 =
-45 • 10 =
231 • -3 =
-214 • -5 =
25 • 12 =


Regla :

+ • + = +
+ • - = -
- • + = -
- • - = +

​

Answer 1

Explicación paso a paso:

-6 • -13 = 78

18 • -3 = -54

12 • -14 = - 168

-120• 5 = -600

-40 • -10 = 400

-20 • -30 = 600

-45 • 10 = -450

231 • -3 = - 693

-214 • -5 = 1070

25 • 12 = 300